Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ae737f38d26bfb…

MALICIOUS

PDF

67.3 KB Created: 2020-11-19 04:39:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 58d45b862c023ed12b53aab301a80f8b SHA-1: abadee1a9ead3d8c6d7980c91023a11b81156662 SHA-256: 29ae737f38d26bfb20855ab795a4f0f4f6e6aa18a6fa35df46be814f33ee11ac
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various platforms. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/aws?utm_term=android+tablets+for+sale+near+me In PDF document text
    • https://padavosasosak.weebly.com/uploads/1/3/4/6/134632247/7258368.pdfIn PDF document text
    • https://wanovupejofo.weebly.com/uploads/1/3/4/5/134580977/a573d2de396.pdfIn PDF document text
    • https://dodimugu.weebly.com/uploads/1/3/4/4/134483739/9697565.pdfIn PDF document text
    • https://dolilifiwu.weebly.com/uploads/1/3/4/4/134401054/jetimas.pdfIn PDF document text
    • https://wepeweguwerixum.weebly.com/uploads/1/3/1/8/131856135/rizakifezuw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfe0f2be-1c42-45d9-89b2-88424319d1be/stock_symbol_for_desktop_metal.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/sozalawaxusowunuwazitopev.pdfIn PDF document text
    • https://s3.amazonaws.com/sanekufiwumafo/10043803767.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/437e9135-57d1-4e04-8f33-f1ef25662a9f/75307181720.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72ab9cba-aa31-4c6f-bab5-a754d1030fe8/veveditinimegamudunitoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b896d875-a6e8-4687-9d82-0af7f684c41b/combat_armor_mk_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab2abc12-608e-486d-8589-56b63546f858/72815404867.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/pray_for_paris.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca319250-e0e5-447e-8e58-ed7ad801e959/xufukojetukeninemugutaze.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB64 5184 bytes
SHA-256: a3d44372c38b81df22a76fc001a8f1af346e170baf50d80e13ef041e9eea3a77
font_01_sfnt_off0000dced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCED 10372 bytes
SHA-256: a9fe743c3136267f97f3c9f67fcdedd1ebf3e9702894b5503c10e00e02db8a11

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